SIGNAL GENERATOR FOR RESPIRATORY GATING, TOMOGRAPHY DEVICE, RADIATION SIMULATOR, AND RADIATION THERAPY DEVICE

摘要

Provided is a signal generator for respiratory gating which forces a patient to take short, quick breaths, and which is capable of detecting body movement caused by the precise breathing. The signal generator for respiratory gating (10) comprises: a trunk stabilizer (11) for stabilizing the trunk of a patient (K); a diaphragm compression device (12) for compressing the diaphragm by pressing the lower hypochondrium of the patient; a body movement detection sensor (14) which is in contact with the patient (K), and detects body movement caused by breathing as a change in pressure; and a controller (16) which receives output from the body movement detection sensor (14), and generates a signal for respiratory gating synchronized to the breathing. The body movement detection sensor (14) comprises: a pressure-receiving vessel (21) in contact with the patient (K); a thin-film sensor element (31); and a sensor receptacle (29) for housing the thin-film sensor element (31). The pressure-receiving vessel (21) and the sensor receptacle (29) are linked by means of a linking tube (25) and air is sealed therewithin.